Catalytic Role of Process Dust in SO2-to-SO3 Conversion in Flash Smelting Heat Recovery Boilers

A1 Journal article (refereed)

Internal Authors/Editors

Publication Details

List of Authors: Juho Lehmusto, Tor Laurén, Mari Lindgren
Publisher: Springer Nature
Place: Switzerland
Publication year: 2019
Journal: JOM Journal of the Minerals, Metals and Materials Society
Journal acronym: JOM
Volume number: 71
Issue number: 9
Start page: 3305
End page: 3313
eISSN: 1543-1851


The aim of this work is to examine the catalytic role of copper smelter, copper converter, and nickel smelter process dusts in SO2-to-SO3 conversion at 750 oC. To clarify the role of specific oxides in greater detail, synthetic dusts containing varying concentrations of either CuO or Fe3O4 were also studied. All studied dusts catalyzed SO3 conversion. Among the industrial flue dusts, the highest concentration of SO3 formed in the presence of copper smelter dust. Comparing individual oxides, CuO had a greater impact on the SO3 formation. Such catalytic effects of smelter dusts may lead to SO3 concentrations in the
process gas so high that sulfuric acid dew point corrosion may occur.


Acid dew point corrosion, Catalyzing oxide, Flash smelting, SO3 formation


Last updated on 2020-28-09 at 03:01